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Air carrier X failed to comply with ATC clearance. Undershot altitude crossing restriction. Situation: large transport type aircraft unable to comply with dowst crossing restriction during hot WX.
| Attributes | |
| ACN | 153236 |
| Time | |
| Date | 199008 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : pom |
| State Reference | CA |
| Altitude | msl bound lower : 12000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 14000 flight time type : 3500 |
| ASRS Report | 153236 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp |
| ASRS Report | 153238 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X ont-ord takeoff 181000#, 81 degrees F, takeoff runway 26R, cleared pom 4 departure to daggett. Reached 2800' just crossing pom VOR. Approximately 3 mi past VOR (pom) switched to lax ARTCC (118.55). On initial contact advised them we would have a difficult time making dowst altitude crossing. Radio call acknowledged but no reference made to dowst comment. Approximately 10 mi northwest pom, we told center we would have difficulty making dowst and asked for relief from the dowst crossing altitude. The call was not acknowledged. We crossed dowst at 12000' turned toward daggett. Lax ARTCC asked us to call ZLA when we landed, obviously because we had not adhered to the published crossing altitude. It should be noted that the published pom 4 departure (pom 4.pom) requires a minimum climb gradient of 385 FPM to 12000' on the daggett transition.
Original NASA ASRS Text
Title: ACR X FAILED TO COMPLY WITH ATC CLRNC. UNDERSHOT ALT CROSSING RESTRICTION. SITUATION: LGT TYPE ACFT UNABLE TO COMPLY WITH DOWST CROSSING RESTRICTION DURING HOT WX.
Narrative: ACR X ONT-ORD TKOF 181000#, 81 DEGS F, TKOF RWY 26R, CLRED POM 4 DEP TO DAGGETT. REACHED 2800' JUST XING POM VOR. APPROX 3 MI PAST VOR (POM) SWITCHED TO LAX ARTCC (118.55). ON INITIAL CONTACT ADVISED THEM WE WOULD HAVE A DIFFICULT TIME MAKING DOWST ALT XING. RADIO CALL ACKNOWLEDGED BUT NO REF MADE TO DOWST COMMENT. APPROX 10 MI NW POM, WE TOLD CENTER WE WOULD HAVE DIFFICULTY MAKING DOWST AND ASKED FOR RELIEF FROM THE DOWST XING ALT. THE CALL WAS NOT ACKNOWLEDGED. WE CROSSED DOWST AT 12000' TURNED TOWARD DAGGETT. LAX ARTCC ASKED US TO CALL ZLA WHEN WE LANDED, OBVIOUSLY BECAUSE WE HAD NOT ADHERED TO THE PUBLISHED XING ALT. IT SHOULD BE NOTED THAT THE PUBLISHED POM 4 DEP (POM 4.POM) REQUIRES A MINIMUM CLB GRADIENT OF 385 FPM TO 12000' ON THE DAGGETT TRANSITION.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.